For alt+tab:
HKEY_CURRENT_USER\Control Panel and Desktop and Coolswitch 0
need reboot.
For CTRL+ALT+DEL,I don't think there is anyway to disable it(UNDER NT),it's part of the security policy for NT,no way!
Alt+F4可另做个程序:首先声明变量为B:Boolena,代码如下:
procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
begin
if (ssAlt in shift) and (Key=VK_F4) then
begin
B:=False;
FormCloseQuery(sender,B);
end;
end;
procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
if B=False then
CanClose:=False
else
CanClose:=True;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
B:=True;
Close;
end;